Created
May 17, 2010 19:20
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#!/usr/bin/env python | |
#-*- coding:utf-8 -*- | |
import sys | |
rdl = sys.stdin.readline | |
def check_sublist(current, desired, missing, to_catch): | |
"""Returns True if elements of desired list are in current list in the same | |
order even if there are other elements in the between""" | |
it = iter(desired) | |
next = it.next() | |
start_pos = current.index(next) | |
missing -= start_pos | |
try: | |
for e in current[start_pos:]: | |
if missing < to_catch: | |
return False | |
if e == next: | |
next = it.next() | |
to_catch -= 1 | |
missing -= 1 | |
except StopIteration: | |
return True | |
return False | |
def gen_sublists(lst, length, starting_with): | |
"""Yields every lst's subsequence with specified length""" | |
#start = 0 | |
start = lst.index(starting_with) | |
for i in xrange(start, len(lst)-length+1): | |
yield lst[i:i+length] | |
def get_minimum_moves(l): | |
"""returns the minimum moves to sort l | |
using worst-case first strategy""" | |
ideal = sorted(l) | |
k = len(ideal) | |
largest = 1 | |
starting_with = ideal[0] | |
for n in xrange(2, k+1): | |
next_flag = False | |
for subl in gen_sublists(ideal, n, starting_with): | |
if check_sublist(l, subl, k, n): | |
starting_with = subl[0] | |
largest += 1 | |
next_flag = True | |
break | |
if not next_flag: | |
return k-largest | |
def process(case): | |
input_list = [int(i) for i in rdl().split()] | |
return get_minimum_moves(input_list) | |
cases = int(rdl()) | |
for case in xrange(1, cases+1): | |
length = int(rdl()) | |
p = process(case) | |
print "Case #%d:"%case, p |
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